Dog collar



FIG. 1 is a top perspective view of a dog collar showing my new design;

FIG. 2 is a right side perspective view thereof;

FIG. 3 is left side perspective view thereof;

FIG. 4 is an end perspective view thereof;

FIG. 5 is a second left side perspective view thereof; and,

FIG. 6 is a bottom perspective view thereof. 

CLAIM What is claimed is the ornamental design for a dog collar, as shown and described. 